Printing equipment detection device and offset press

Abstract

The utility model relates to a printing equipment detection device and an offset press, and relates to the technical field of printing machines. A printing equipment detection device comprises a printing assembly and a detection assembly, the printing assembly comprises a rubber blanket cylinder and an impression cylinder, the rubber blanket cylinder and the impression cylinder are each provided with a neutral position, the peripheral wall of the rubber blanket cylinder is covered with rubber blanket, and a rear opening of the rubber blanket is fixed to the neutral position of the rubber blanket cylinder; the detection assembly comprises a detection sensor, the detection sensor is arranged at the neutral position of the rubber blanket cylinder and / or the impression cylinder, and the detection sensor is used for detecting the cleaning liquid entering or leaving the neutral position, so that an operator can conveniently judge whether redundant cleaning liquid is left or not and timely clean the residual cleaning liquid; and the situation that waste products are printed in batches due to the fact that cleaning liquid pollutes paper in the printing process is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of printing machines, and in particular to a printing equipment detection device and an offset printing machine. Background Art

[0002] Existing offset printing presses typically include a blanket cylinder, plate cylinder, and impression cylinder. When the press is stopped or idling, there's a gap or distance between the three cylinders. Once the press is running, it begins to press together: as paper is fed from the press feeder into the press, the plate cylinder and blanket cylinder first come into contact, creating pressure that transfers the ink and text on the plate surface to the blanket. Simultaneously, as the blanket and impression cylinders press together, the paper passes between them. Due to the pressure between the two cylinders, the ink and text on the blanket surface are transferred to the paper, effectively transferring the ink from the plate surface to the paper. Printing is based on the transfer of ink, and the combined pressure between the cylinders allows for a simple transfer of text and text to the paper.

[0003] During routine operations, when cleaning the blanket, printing press operators often need to apply a relatively large amount of cleaning agent to clean the blanket surface due to excessive paper dust. This can lead to a slightly larger amount of cleaning agent being applied. During the initial press cycle, when the blanket cylinder, plate cylinder, and impression cylinder are pressed together, the cleaning agent is squeezed and flows to the rear edge of the blanket. This pressure also causes the cleaning agent to reach the rear edge of the impression cylinder and be thrown into the gap between the blanket and impression cylinders. As the press runs at high speeds, the cleaning agent is further thrown onto the surfaces of the blanket and impression cylinders. Typical presses operate at idle speeds exceeding 3,000 prints per hour. At these speeds, centrifugal force is sufficient to throw the cleaning agent into the gap between the blanket and the impression cylinder, resulting in waste during normal printing. When the press is running at 6,000-8,000 prints per hour, the liquid will be thrown back onto the impression and blanket surfaces in the neutral position because the blanket and impression cylinders are in close contact during printing. This will adhere to the back and front of the paper, causing waste. When the operator samples and discovers waste, 100-200 sheets of paper may have spots of liquid on them, resulting in a huge waste of printed materials. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a printing equipment detection device and an offset printing press to solve the above-mentioned technical problems.

[0005] In the first aspect, an embodiment of the utility model provides a printing equipment detection device, which includes: a printing component and a detection component, the printing component includes a rubber cloth cylinder and a pressing cylinder, the rubber cloth cylinder and the pressing cylinder have relatively set neutral positions, the peripheral wall of the rubber cloth cylinder is covered with a rubber cloth, and the two ends of the rubber cloth are fixed at the neutral position of the rubber cloth cylinder, the detection component includes a detection sensor, the detection sensor is set at the neutral position of the rubber cloth cylinder and / or the pressing cylinder, and the detection sensor is used to detect whether there is residual cleaning liquid in the neutral position.

[0006] Optionally, the printing equipment detection device further includes an alarm component, which is electrically connected to the detection sensor and is used to send an alarm signal.

[0007] Optionally, the alarm component includes one or more of a sound alarm device or a light alarm device.

[0008] Optionally, the detection component further includes an image detection device and a display device, the image detection device is used to detect the image of the neutral position of the blanket cylinder and / or the impression cylinder, and the display device is signal-connected to the image detection device.

[0009] Optionally, a lighting assembly is provided on the blanket cylinder and / or the impression cylinder.

[0010] Optionally, the printing equipment detection device further includes a drying component, which is used to dry the rubber cloth cylinder and / or the impression cylinder.

[0011] Optionally, the drying component includes an air drying duct, and a plurality of air outlets are arranged at intervals on the air drying duct, and the air outlets face a neutral position.

[0012] Optionally, the drying component further includes an air pump, and an air outlet of the air pump is connected to the air drying duct.

[0013] Optionally, the printing equipment detection device further includes a control device, which is signal-connected to the detection component.

[0014] On the other hand, an embodiment of the present invention further provides an offset printing press, which includes a frame, a printing roller, a plate cylinder and any of the above-mentioned printing equipment detection devices, and the printing roller, the plate cylinder and the printing equipment detection device are all arranged on the frame.

[0015] The utility model provides a printing equipment detection device, which includes: a printing component and a detection component, the printing component includes a rubber cloth cylinder and an impression cylinder, the rubber cloth cylinder and the impression cylinder both have a neutral position, the peripheral wall of the rubber cloth cylinder is covered with a rubber cloth, and the rear end of the rubber cloth is fixed at the neutral position of the rubber cloth cylinder, the detection component includes a detection sensor, the detection sensor is set at the neutral position of the rubber cloth cylinder and / or the impression cylinder, and the detection sensor detects the cleaning liquid entering or leaving the neutral position, so that the operator can judge whether there is excess cleaning liquid and clean the residual cleaning liquid in time to avoid the cleaning liquid contaminating paper during the printing process, resulting in the occurrence of batch printing waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A three-dimensional diagram of a printing equipment detection device provided in an embodiment of the present application;

[0018] Figure 2 A three-dimensional diagram of the offset printing machine provided in an embodiment of the present application.

[0019] Icons: 100-printing component; 200-detection component; 101-blanket cylinder; 102-impression cylinder; 201-detection sensor; 300-alarm component; 202-image detection device; 103-neutral position; 400-display device; 500-drying component; 501-air drying duct; 502-air pump; 600-control device; 700-frame; 800-printing roller; 900-plate cylinder. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0022] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0023] This embodiment provides a printing equipment detection device, which includes: a printing component 100 and a detection component 200, the printing component 100 includes a blanket cylinder 101 and an impression cylinder 102, the blanket cylinder 101 and the impression cylinder 102 both have a neutral position 103, the peripheral wall of the blanket cylinder 101 is covered with a blanket, and the rear end of the blanket is fixed at the neutral position 103 of the blanket cylinder 101, the detection component 200 includes a detection sensor 201, the detection sensor 201 is arranged at the neutral position 103 of the blanket cylinder 101 and / or the impression cylinder 102, and the detection sensor 201 is used to detect cleaning liquid entering the neutral position 103.

[0024] Please refer to Figure 1 and Figure 2 As shown, Figure 1 A three-dimensional diagram of a printing equipment detection device provided in an embodiment of the present application. The blanket cylinder 101 and the printing cylinder are arranged relative to each other, and a neutral position 103 is provided on the blanket cylinder 101 and the printing cylinder, respectively. The neutral position 103 forms a gap during continuous printing, thereby facilitating the subsequent segmentation of continuously printed products. It can be understood that the outer surface of the existing blanket cylinder 101 is covered with a blanket. The existing blanket is usually a square structure. The blanket is covered on the surface of the blanket cylinder 101, and the upper and lower edges of the blanket are fixed to the neutral position 103 of the blanket cylinder 101. The edge where the blanket is connected to the blanket cylinder 101 is the rear end position of the blanket (hereinafter referred to as the blanket rear end).

[0025] After cleaning the blanket cylinder 101 and the impression cylinder 102, if a large amount of cleaning liquid remains on the blanket cylinder 101, when the printing press is first pressed together, the blanket cylinder 101 and the plate cylinder 900 are pressed together, and the blanket cylinder 101 and the impression cylinder 102 are pressed together, the excess cleaning liquid will be squeezed out under the pressure and flow to the rear end of the blanket. At the same time, it will also stick to the rear end of the impression cylinder 102 and be thrown to the neutral position 103 between the blanket and the impression cylinder 102. As the machine runs at high speed, the liquid will be thrown onto the surface of the blanket cylinder 101 and the impression cylinder 102. Since the blanket cylinder 101 and the impression cylinder 102 are printing in the pressed state, the liquid will be thrown again at the neutral position 103 onto the impression and the blanket surface, thereby adhering to the back and front of the paper, causing waste. By the time the operator detects waste during sampling, 100-200 sheets of paper may already have spots of cleaning liquid adhering to them, resulting in significant waste of printed materials. Therefore, in this embodiment, a detection sensor 201 is provided at the neutral position 103 between the blanket cylinder 101 and the platen cylinder to detect whether liquid has entered the neutral position 103 between the blanket cylinder 101 and the platen cylinder. If excessive cleaning liquid is detected entering the neutral position 103 or overflowing from the neutral position 103, the operator can promptly detect and stop printing to remove the excess cleaning liquid, thus avoiding paper waste during printing.

[0026] Optionally, in some possible embodiments, the detection sensor 201 may be a photoelectric detection sensor 201. The photoelectric detection sensor 201 is disposed on both sides of the blanket cylinder 101 and the impression cylinder 102. When excess cleaning liquid enters the neutral position 103 of the blanket cylinder 101 or the impression cylinder 102, or when residual cleaning liquid in the neutral position 103 is thrown out, it blocks the detection light of the photoelectric detection sensor 201, thereby triggering the photoelectric sensor to generate a signal. The photoelectric sensor may be connected to a controller of the printing device. When it detects that cleaning liquid has entered or left the neutral position 103, the printing device may automatically stop, thereby avoiding continuous printing and waste of paper.

[0027] Optionally, in some possible embodiments, the printing equipment detection device further includes an alarm component 300 , which is electrically connected to the detection sensor 201 , and is configured to send an alarm signal.

[0028] The detection sensor 201 can also be connected to the alarm assembly 300. When the detection sensor 201 is triggered and generates a control signal, the alarm assembly 300 receives the signal and issues an alarm prompt, allowing the operator to promptly dispose of the cleaning fluid on the blanket cylinder 101 and the impression cylinder 102. This prevents residual cleaning fluid from overflowing or splashing onto the printing area of ​​the blanket cylinder 101 or the impression cylinder 102 and contaminating the paper. Optionally, the alarm assembly 300 includes one or more of an audible alarm device and a light alarm device. The light or audible alarm signal issued by the alarm assembly 300 alerts the operator, allowing the operator to quickly identify the printing device that needs cleaning and promptly address it.

[0029] Optionally, in some possible embodiments, the detection assembly 200 further includes an image detection device 202 , and the image detection device 202 is used to detect an image of the neutral position 103 of the blanket cylinder 101 and / or the impression cylinder 102 .

[0030] Please refer to Figure 1 As shown, an image detection device 202, such as a camera, is provided at the neutral position 103 of the blanket cylinder 101. The number of image detection devices 202 can be one or more and can be adjusted according to the length of the blanket cylinder 101. The image detection device 202 faces the rear end of the rubber portion, thereby monitoring the image of the rear end of the blanket in real time.

[0031] Optionally, in some possible embodiments, the printing equipment detection device further includes a display device 400 , which is signal-connected to the image detection device 202 , and an operator can observe image information output by the image detection device 202 through the display device 400 .

[0032] Optionally, in some possible embodiments, the image detection device 202 may be connected to an external display screen or a mobile display device signal to facilitate operators to observe relevant images at any time.

[0033] Optionally, in some possible embodiments, a lighting component is provided on the blanket cylinder 101, and the lighting component may be an LED lighting lamp or other light-emitting component. The lighting component emits light to illuminate the blanket cylinder 101, ensuring that the image detection device 202 can capture clear images, which is convenient for the operator to observe. It can be understood that components such as the blanket cylinder 101 and the impression cylinder 102 are usually arranged inside the printing device, and the outside is usually provided with a mounting frame 700 or a protective shell and other structures. Therefore, the light at the blanket cylinder 101 and the impression cylinder 102 is usually dim, and the effect of directly using the image detection device 202 to collect image information is poor. Therefore, a lighting component is provided for fill light to ensure the imaging effect of the image detection component 200. In poorly lit environments such as at night, fill light can also be provided by the lighting component to facilitate observation by the operator.

[0034] Optionally, in some possible embodiments, the printing equipment detection device further includes a drying component 500 , and the drying component 500 is used to dry the blanket cylinder 101 and / or the impression cylinder 102 .

[0035] The drying component 500 can be an air drying device or a heating drying device, which can quickly evaporate the cleaning liquid remaining in the neutral position 103 of the blanket cylinder 101 or the impression cylinder 102 by accelerating air flow or increasing temperature, thereby preventing the residual cleaning liquid from overflowing or splashing onto the printing surface during printing and contaminating the paper.

[0036] Optionally, in some possible embodiments, the drying component 500 includes an air drying duct 501 , and a plurality of air outlets are arranged at intervals on the air drying duct 501 , and the air outlets are located at the neutral position 103 .

[0037] Please refer to Figure 1 As shown, the air-drying duct 501 can be connected to an external blower or air pump 502, and a continuous airflow of drying air can be ejected through the air outlet of the air-drying duct 501. The air outlet of the air-drying duct 501 is directly aligned with the neutral position 103 of the blanket cylinder 101, thereby air-drying the blanket cylinder 101, particularly the rear end of the blanket, achieving an automatic drying effect and saving labor costs. Furthermore, the air-drying duct 501 has a simple structure and low production costs.

[0038] The drying assembly 500 and the image detection assembly 200 work in synergy. The operator can observe real-time images of the blanket cylinder 101 and the impression cylinder through the image detection assembly 200 and, based on the image information, determine whether to activate the drying assembly 500 for drying. If the operator observes that little cleaning fluid remains on the blanket, printing can be stopped without stopping the machine, allowing the blanket and impression cylinder 102 to idle. At this point, the drying assembly 500 can be opened to clean the residual cleaning fluid from the blanket cylinder 101 and the impression cylinder 102. During this cleaning process, the image detection device 202 records the image in real time, allowing the operator to determine whether the cleaning fluid has evaporated completely. Once the cleaning fluid has been removed, drying is stopped. Since cleaning occurs without stopping the machine, printing can be quickly resumed by simply adding ink and paper, reducing downtime. This process eliminates the need for manual operation of the printing equipment, saving labor costs and improving work efficiency. When the operator observes that there is too much cleaning liquid remaining on the blanket cylinder 101 or the impression cylinder 102 and that the drying component 500 cannot achieve complete drying or the drying efficiency is low, the operator can turn off the printing device and manually clean the blanket, blanket cylinder 101 and the impression cylinder 102.

[0039] Optionally, in some possible embodiments, the printing equipment detection device further includes a control device 600 , and the control device 600 is signal-connected to the detection component 200 .

[0040] Please refer to Figure 1 and Figure 2 As shown, the control device 600 may include a central control circuit and a control panel, etc. The central control circuit may adopt an existing programmable control circuit board. The above-mentioned detection component 200, alarm component 300, image detection device 202 and control panel and other components are all connected to the central control circuit to realize circuit control.

[0041] An embodiment of the present application also provides an offset printing press, which includes a frame 700, a printing roller 800, a plate cylinder 900 and any of the above-mentioned printing equipment detection devices, and the printing roller 800, the plate cylinder 900 and the printing equipment detection device are all arranged on the frame 700.

[0042] Please refer to Figure 2 As shown, the printing roller 800, the plate cylinder 900, the rubber cylinder 101 and the impression cylinder 102 are arranged on the frame 700 in sequence from top to bottom in the vertical direction. The rubber cylinder and the impression cylinder 102 are provided with a detection component 200. After cleaning, the detection component 200 can detect whether there is residual cleaning entering or leaving the neutral position 103, which is convenient for the operator to clean the residual cleaning liquid in time and avoid the cleaning liquid from contaminating the paper during the printing process.

[0043] It should be noted that multiple sets of blanket cylinders and impression cylinders 102 can be installed on the frame 700, each set of blanket cylinders and impression cylinders 102 being capable of printing different colors or contents, thereby achieving color printing. In this case, a detection assembly 200 is provided on each set of blanket cylinders and impression cylinders 102 to detect whether cleaning fluid remains on that set. An alarm assembly 300 can also be provided on each set of blanket cylinders and impression cylinders 102, allowing operators to quickly locate which set of blanket cylinders and impression cylinders 102 has residual cleaning fluid, facilitating timely removal.

[0044] It should be noted that, unless there is any conflict, the features in the embodiments of this application can be combined with each other.

[0045] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A printing equipment detection device, characterized in that: include: A printing assembly (100) and a detection assembly (200), wherein the printing assembly (100) comprises a rubber cloth cylinder (101) and an impression cylinder (102), wherein the rubber cloth cylinder (101) and the impression cylinder (102) have neutral positions arranged relatively to each other, a rubber cloth is covered on the peripheral wall of the rubber cloth cylinder (101), and both ends of the rubber cloth are fixed at the neutral position of the rubber cloth cylinder (101), and the detection assembly (200) comprises a detection sensor (201), wherein the detection sensor (201) is arranged at the neutral position of the rubber cloth cylinder (101) and / or the impression cylinder (102), and the detection sensor (201) is used to detect whether cleaning liquid remains at the neutral position.

2. The printing equipment detection device according to claim 1, characterized in that: The printing equipment detection device further comprises an alarm component (300), wherein the alarm component (300) is electrically connected to the detection sensor (201), and the alarm component (300) is used to send an alarm signal.

3. The printing equipment detection device according to claim 2, characterized in that: The alarm component (300) includes one or more of a sound alarm device and a light alarm device.

4. The printing equipment detection device according to claim 1, characterized in that: The detection assembly (200) further comprises an image detection device (202) and a display device, wherein the image detection device (202) is used to detect an image of the neutral position of the blanket cylinder (101) and / or the impression cylinder (102), and the display device (400) is connected to the image detection device by signal.

5. The printing equipment detection device according to claim 4, characterized in that: The blanket cylinder and / or the impression cylinder is provided with a lighting assembly.

6. The printing equipment detection device according to claim 1, characterized in that: The printing equipment detection device further comprises a drying component (500), wherein the drying component (500) is used for drying the blanket cylinder (101) and / or the impression cylinder (102).

7. The printing equipment detection device according to claim 6, characterized in that: The drying component (500) comprises an air drying duct (501), and a plurality of air outlets are arranged at intervals on the air drying duct (501), and the air outlets face the neutral position.

8. The printing equipment detection device according to claim 7, characterized in that: The drying component further comprises an air pump (502), and the air outlet of the air pump (502) is connected to the air drying pipe (501).

9. The printing equipment detection device according to claim 1, characterized in that: The printing equipment detection device further comprises a control device (600), and the control device (600) is connected to the detection component (200) via signals.

10. An offset printing machine, characterized in that: The printing device comprises a frame (700), a printing roller (800), a plate cylinder (900) and a printing equipment detection device according to any one of claims 1 to 9, wherein the printing roller (800), the plate cylinder (900) and the printing equipment detection device are all arranged on the frame (700).

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